312787345 has 8 divisors (see below), whose sum is σ = 404217576. Its totient is φ = 230981376.

The previous prime is 312787339. The next prime is 312787351. The reversal of 312787345 is 543787213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (312787339) and next prime (312787351).

It can be written as a sum of positive squares in 4 ways, for example, as 17497489 + 295289856 = 4183^2 + 17184^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312787345 - 2³ = 312787337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312787298 and 312787307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405992 + ... + 2406121.

It is an arithmetic number, because the mean of its divisors is an integer number (50527197).

Almost surely, 2^312787345 is an apocalyptic number.

It is an amenable number.

312787345 is a deficient number, since it is larger than the sum of its proper divisors (91430231).

312787345 is a wasteful number, since it uses less digits than its factorization.

312787345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812131.

The product of its digits is 141120, while the sum is 40.

The square root of 312787345 is about 17685.7950061624. The cubic root of 312787345 is about 678.8123335858.

The spelling of 312787345 in words is "three hundred twelve million, seven hundred eighty-seven thousand, three hundred forty-five".